1242059 玖、發明說明： (一） 發明所屬之技術領域 本發明係關於紡紗機中之紗尾切斷裝置’ §羊固之係有關 由落紗裝置抽起管紗的錠子插入空筒管後之再起動機台時 ’自動的實行卷取紗的紡紗機中之紗尾切斷裝置。 (二） 先前技術 藉由鋼絲圈實行卷取紗的環錠紡紗機、環錠捻線機等之 糸方紗機，於滿管時爲了自動的實行換管作業，在換管後之 再起動時自動的可將紗卷取在空筒管，要求有連於羅拉部 的紗仍依通過鋼絲圈而連接在錠子。爲了滿足此要求，先 前在錠子基部設紗尾切斷部，及其下方設置紗尾卷部，滿 管後迅速下降鋼領板實行傾斜卷（卷腰部）後，對紗尾卷部 卷繞紗，於抽起滿管紗時用紗尾切斷部切斷紗尾卷部連於 滿管紗的紗（紗尾）。 可是此切斷方法’卷繞在紗尾卷部的紗尾於落紗後殘留 在紗尾卷邰’每反覆落紗時增加了殘留紗之量，須要頻繁 地實行殘留紗處理。又因卷繞紗尾的長度長，有去除殘留 紗困難的問題。 爲了解決上述之問題，提案有將從鋼絲圈連於管紗的紗 用可開閉的把持部把持，依落紗裝置由管紗的抽起動作， 用刀具切斷從該把持部連於管紗的紗尾切斷方法（例如，參 照專利文獻1、專利文獻2)。 專利文獻1 ’杨不有將紗尾固定在旋子的包腳紗環，與 於插入固定錠子的錠盤，用以可上下方向滑動地裝備的滑 1242059 動套筒來把持構成的裝置。 此裝置如本案說明書之第6圖、第7圖所示，固定 紗環5 2在錠子5 0之筒管嵌合部5 1下部，設置有延伸 子5 0軸方向之複數突起部5 3於包腳紗環5 2之下方。 5 〇之錠盤（w h 〇 r 1) 5 4於突起部5 3所導引以上下方向可 地設置滑動套筒5 5，套筒5 5其上端以可頂接包腳紗: 下面由壓縮彈簧5 6賦予能。包腳紗環5 2之下方設置 在套筒5 5外側。 於此設置，落紗時環軌5 8在下降至紗尾卷位置途中 軌5 8向下停止器5 8 a與套筒5 5之停止器環5 5 a頂接 伴隨下降環軌5 8套筒5 5就抗拒壓縮彈簧5 6的賦予能 環軌5 8 —起下降。如第6圖所示’配置環軌5 8於紗 位置狀態，經鋼絲圈5 9連繫在管紗6 0的紗Y，變成 置於包腳紗環5 2下面與套筒5 5上端之間狀態。並由 此狀態再度上升環軌5 8停止在落紗位置，所以變成用 卷繞1圈以下於錠子5 0狀態，由包腳紗環5 2下面及 5 5上端所把持狀態。從其狀態落紗管紗6 0，在落紗途 刀5 7切斷連於管紗6 0的紗Y。尙亦揭示有不設置5 7 在落紗途中壓接連於管紗6 0的紗Y在包腳紗環5 2之 來引拉撕斷紗Y宗旨。又亦揭示有於包腳紗環5 2下面 痕，設置與該刻痕繫合的刻痕在套筒5 5上端。 另一方面專利文獻2記載之方法，如本案說明書第-所示，以可升降地設置具備筒管嵌插部6〗a及刀具部 的紗尾切斷構件6 1，在延伸於較錠子基部5 0 a上方白勺 包腳 於錠 錠子 滑動 環52 刀57 ，環 後， 力與 尾卷 爲配 於從 紗尾 套筒 中用 ，可 邊緣 設刻 8圖 6 1 b 錠桿 -6- 1242059 5 0 b。紗尾切斷構件6 1經常由螺旋彈簧6 2賦予能於錠子基 部5 0 a側。於停止落紗時，環軌就停止在紗尾切斷構件6 1 與錠子基部5 0 a之頂接部近旁。然後於較該頂接部稱爲下 位置用卷繞約1圈以下狀態停止錠子5 0。其次由落紗裝置 抽起管紗，與管紗一起上升紗尾切斷構件6 1至抽起途中， 從管紗進連在鋼絲圈的紗於紗尾切斷構件6 1與錠子基部 5 0 a之間。其後，把持紗於從管紗脫離的紗尾切斷構件6 1 與錠子基部5 0 a之間，同時在刀具部6 1 b切斷紗。 (專利文獻1 ) 曰本國特開平1 0- 3 1 72 3 3號公報（說明書段落） (專利文獻2) 日本國特開2 0 0 2 - 1 7 3 8 3 7號公報（說明書段落） (三）發明內容 (發明欲解決的課題） 專利文獻1及專利文獻2記載的紗尾切斷方法，可以1 圈以下之卷繞量即可把持紗尾。可是揭示於專利文獻1的 裝置，就須要將與包腳紗環5 2協動來把持紗的套筒5 5， 使其上端頂接包腳紗環5 2之下面來保持的壓縮彈簧5 6。 壓縮彈簧5 6係抗拒套筒5 5及停止器環5 5 a重量將套筒5 5 向上方推舉’同時用把持所須要的力有頂接套筒5 5於包腳 紗環5 2下面的必要。因而壓縮彈簧5 6就必要較把持所需 要賦予能力大的彈簧力。 在環錠紡紗機，〜般存在有錠子在一側爲2 0 0錠前後， 長機台之狀況時爲一側4 0 0旋以上。因而，有使環軌5 8抗 1242059 拒多數壓縮彈簧5 6之賦予能力，予以下降之必要，所以變 成爲了下降環軌就需要大的動力。又將環軌之下降用環軌 之重量消極的實行構成，欲下降至規定之紗尾卷位置變困 難。又欲將環軌5 8在落紗停止位置至停止之控制變爲複雜。 另一方面，專利文獻2記載之方法，係紗尾切斷構件6 1 伴隨著落紗裝置之落紗動作，與管紗一起從把持位置開放 位置移動，環軌僅下降移動至落紗停止位置即可，環軌之下 降控制比較於專利文獻1變成簡單。紗尾切斷構件6丨爲了 用形成爲水平的其下面，與錠子基部5 0 a上面之間來把持 紗，於紗尾切斷構件6 1之推壓力小時，在空筒管插入後之 卷取開始之際，有時候從把持部抽起紗會變成不能卷取狀 況。爲了作大由紗尾切斷構件6 1的把持力，加重紗尾切斷 構件6 1之自重，或增大螺旋彈簧62之賦予能力，有對落 紗裝置之動作招致障礙之慮。 本發明係有鑑於上述先前之問題點所完成者，其目的在 於提供落紗停止時不篆月 之動作障礙，可縮短於錠子基部殘留紗（紗尾）的紡紗機之紗 尾切斷裝置。 (爲了解決課題的手段） 爲了達成上述目的，如申請專利範圍第1項之發明，係 由落紗裝置抽起管紗的錠子插入空筒管後之機台再起動時 ，自動的實行卷取紗的紡紗機之紗尾切斷裝置，具備有自 錠子基部向上方延伸的錠桿。又具備以可升降地設在該銳 桿，同時用來嵌插筒管的筒管嵌插部；及設於比該筒管嵌 -8- 1242059 插部下側的刀具部，具有經常係下端部頂接於該錠子基部 在與該錠子基部之間可把持紗尾的紗尾切斷構件。具有設 於相對該紗尾切斷構件之下端部及該下端部的該錠子基部 之上端部，互相可繫合的複數凸部及凹部。再者，具備有 設在該紗尾切斷構件與該錠桿之間，於落紗時限制該紗尾 切斷構件比與該錠子基部頂接位置上升於規定高度以上的 限制手段。 在本發明’筒管用其下部嵌合於紗尾切斷構件之筒管嵌 插部狀態裝在錠子。落紗停止時下降環軌，經鋼絲圈用連於 管紗的紗通過紗尾切斷構件與該錠子基部之頂接部以下之位 置狀態停止環軌。然後，將紗卷繞於紗尾切斷構件與錠子基 部之頂接部之位置狀態停止錠子。其次由落紗裝置抽起管紗 ，在抽起途中從管紗連於鋼絲圈的紗導進紗尾切斷構件與錠 子基部之間。其後’由限制手段限制紗尾切斷構件之上升， 紗尾切斷構件從管紗脫離下降。然後把持該紗於自管紗脫離 的紗尾切斷構件與錠子基部之間，同時用刀具部切斷紗。連 於鋼絲圈紗的端部乃至下一個落紗止，把持於紗尾切斷構件 與錠子基部之間。在紗尾切斷構件與錠子基部之間所把持紗 ，於下一次落紗之際與管紗一起自錠子脫離。紗因由相對於 紗尾切斷構件下端部及該下端部的錠子基部上端部所設複數 凸部及凹部用彎曲狀態把持，所以推壓紗尾切斷構件於錠子 基部端部側的力，對落紗裝置之動作不給與障礙程度小時， 亦確實地實行把持紗。因而，在落紗停止時不要環軌複雜的 動作，對落紗裝置之動作不會招致障礙，可縮短殘留在錠子 -9- 1242059 基部的紗（紗尾）。 如申請專利範圍第2項之發明，於申請專利範圍第1項之 發明’設成該複數之凸部及凹部延伸於徑方向。在本發明用 把持紗在複數凸部及凹部狀態變成鋸齒形狀，所以紗尾切斷 構件之推壓力小時，可將紗保持在把持狀態。 如申請專利範圍第3項之發明於申請專利範圍第1或2項 之發明’該紗尾切斷構件之下端部以錠子爲旋轉中心，形成 爲如頂點含該下端部外周位於比與錠子正交的面上方，構成 爲假想圓錐斜面之一部分。 用1卷以內卷経於錠子狀態之紗，作用了從把持部向抽 起紗方向之力時，作用向半徑方向且外側的力於紗。其之 際如本發明，把持面向下方傾斜時，與把持紗在水平面實 行狀況比較加以紗的阻力變大，抽起紗變困難。其結果， 把持紗所需要的紗尾切斷構件之推壓力，與把持面爲水平 之狀況比較可作成小。 如申請專利範圍第4項之發明係於申請專利範圍第1至3 項之發明，具備有對該紗尾切斷構件之該錠子基部用來確保 同心的調心手段。在本發明依調心手段之作用，紗尾切斷構 件與錠子用同心狀旋轉，故旋轉中不易產生振動，在高速旋 轉時亦可穩定的旋轉。 如申請專利範圍第5項之發明係於申請專利範圍第4項之 發明，該調心手段，設置於該紗尾切斷構件及該錠子基部互 相相對的位置，具備有構成將銳子作旋轉中心的假想圓錐斜 面之曲面。於本發明，係落紗時從錠子基部脫離自錠子基部 -10- 1242059 向上方移動的紗尾切斷構件，下降而再度與錠子基部繫合之 際’由於繫合該彼此曲面，予以調心紗尾切斷構件與錠子成 爲同軸。 如申請專利範圍第6項之發明係於申請專利範圍第1至5 項中任一項之發明，與該錠子基部及該紗尾切斷構件之該錠 子基部繫合部分之一側爲金屬製，另一側爲樹脂製。將兩者 作爲金屬製時，紗尾切斷構件自管紗脫離而下降（落下），在 與錠子基部之間把持紗之際，於細支紗時由用把持部夾持的 衝擊，有在把持部之端部切斷部之慮。其狀況時，切斷自錠 子基部至鋼絲圈的紗，再起動時變成爲不能自動卷取紗。可 是由於將一側作爲樹脂製故細支紗時，也可以防止紗由把持 之衝擊在把持部之端部切斷。 (四）實施方式 (發明之實施形態） 以下，依照第1(a)、（b)圖〜第4(a)〜（d)圖說明具體化本 發明的一實施形態。 如第1圖（a)所示，錠子1藉由軸承4以可旋轉地支撐於 固定在錠子軌2的錠腳3(bolster)。錠子1具有錠桿部5， 及固定在錠桿剖5下側中心部的錠子軸6，用錠子軸6插 入錠腳3狀態以可旋轉地支撐於錠腳3。錠桿部5具有： 裝設筒管B的錠桿5 a ;形成於錠桿5 a下側比錠桿5 a大徑 的錠子基部5 b ;及形成在錠子基部5 b下側的掛皮帶部5 c 。錬桿部5除了錶子基部5 b外的部分爲銘或銘合金製’樹 脂製之錠子基部5 b嵌合固定於錠桿5 a之下部。錠子軸6 1242059 係內嵌成形於錠桿部5。錠桿5 a之上部裝備有將筒管b繫 止爲可一體旋轉的繫止構件（例如鈕片）7。 自錠子基邰5 b延伸於上方的錠桿5 a，設成紗尾切斷構 件8爲可升降。如第1圖（b)所示紗尾切斷構件8具備有： 嵌插筒管B的筒管嵌插部9 ;及設置於筒管嵌插部8下側 的刀具邰1 〇。刀具部1 〇以圓環狀之刀刃體丨〇 a爲別體， 具有固定刀刃體1 0 a的複數繋止凸部丨〇 b。此實施形態係 形成刀刃體1 0 a前端之直徑大於筒管b下端之外徑。 筒管嵌插部9形成爲圓環狀，同時在內側形成有收容螺 旋彈簧1 1的凹部9a。紗尾切斷構件8係構成爲於經常下 端邰頂接在錠子基部· 5 b，與錠子基部5 b之間可把持紗尾。 錠桿5 a於紗尾切斷構件8頂接於錠子基部5 b的狀態， 在其下部相對於筒管嵌插部9之上端位置固定有作爲停止 器之軸環1 2。軸環1 2之外徑形成爲若干小於凹部9 a之內 徑’而紗尾切斷構件8乃沿軸環1 2滑動。筒管嵌插部9係 其外徑愈佳上側形成爲變小。 螺旋彈簧1 1係下端頂接於凹部9a下端，用上端頂接於 軸環1 2下端狀態收容在凹部9 a。螺旋彈簧11，構成爲經 常將紗尾切斷構件8賦予能於錠子基部5 b側的彈簧。又螺 旋彈簧1 1設在紗尾切斷構件8與錠桿5 a之前，構成爲在 落紗時限制紗尾切斷構件8。自與錠子基部5 b頂接位置上 升所規定高度以上的限制手段。 如第1圖（b)及第2圖所示，相對於紗尾切斷構件8下端 部及該下端部世5 b之上端部，如向徑方向延伸設有互相可 -12- 1242059 繫合的複數凸部1 3 a、] 3 b及凹部1 4 a、1 4 b。因而成爲紗尾 切斷構件8下端部及錠子基部5 b之上端部，具備互相嚙合 的複數齒之構成。凸部1 3 a、1 3 b及凹部1 4 a、1 4 b與徑方 向正交的剖面形狀形成爲四角形狀。凸部1 3 a、1 3 b之高度 及凹部1 4 a、1 4 b之深度係2 m m程度爲理想。 紗尾切斷構件8之下端部，形成爲如構成以錠子1作旋 轉中心頂點含該下端部外周，位於錠子1正交面較上方的 假想圓錐斜面之一部分。錠子基部5 b之上端部，亦形成爲 如構成以錠子1作旋轉中心頂點含該下端部外周，位於與 錠子1正交面較上方的假想圓錐斜面之一部分。 錠子基部5 b各凸部1 3 b之錠桿5 a側端面1 5，形成爲構 成以錠子1作旋轉中心的向下假想圓錐之斜面所成曲面。 紗尾切斷構件8各凹部1 4a之錠桿5 a側，形成有可與端面 1 5頂接，以錠子作旋轉中心構成假想圓錐之斜面具曲面 1 6 a的壁1 6。端面1 5及壁1 6就構成對紗尾切斷構件8之 锭子基部5 b確保同心的調心手段。 形成環狀之槽9 6於筒管嵌插部9下部外周面，槽9 6內 用一部分突出於槽9 6之外狀態收容有橡膠環1 7。橡膠環 17構成爲用來提高筒管嵌插部9與筒管8嵌合力的嵌合力 增強手段。 其次說明如上述所構成裝置之作用。 筒管B嵌合其下部在紗尾切斷構件8之筒管嵌插部9， 用繫合上部於繫止構件7狀態以可一體旋轉地裝於錠子1 。然後，藉由未圖示的壓接於掛皮帶部5 c之皮帶旋轉錠子 1242059 1 ’與錠子1 一體旋轉筒管B。 繼續紡出成爲滿管時實行規定之停止動作，用與先前同 樣的動作急速下降環軌1 8，對錠子1實行傾斜卷（腰部卷）1 9 a 。其後，環軌1 8經鋼絲圈2 0使連於管紗1 9的紗Y，在通 過紗尾切斷構件8與錠子基部5 b的頂接部以下之位置狀態 停止。然後於紗尾切斷構件8與錠子基部5 b的頂接部以下 之位置，如形成卷繞約1圈之紗狀態加以制動予以停止錠 子1。其次配置導鈎板在不妨礙落紗的躲避位置，成爲如 第4圖（a)所示狀態。 其次如第4圖（b)所示，以落紗裝置2 2抽起管紗（滿筒管） 。紗尾切斷構件8與管紗1 9 一起上升至抽起途中，從管紗 1 9導入連在鋼絲圈2 0的紗Y於紗尾切斷構件8與錠子基 部5 b之間。卷繞在細子基部5 b狀態的紗γ，從第4圖（a) 所示狀態與管紗1 9 一起紗尾切斷構件8上升時，沿著錠桿 5 a之外面移動。 與管紗1 9 一起上升的紗尾切斷構件8到達規定高度時， 由螺旋彈簧1 1的賦予能力紗尾切斷構件8就從管紗1 9脫 離。然後紗尾切斷構件8下降至與紡紗機5 b頂接的位置’ 把持自管紗1 9連在鋼絲圈2 0的紗y於紗尾切斷構.件8與 紡紗機5 b之間。因管紗19繼續上升’所以紗γ用張緊狀 態壓接於刀刃體1 0 a予以切斷，成爲如第4圖（C)狀態。紗 尾切斷構件8從管紗1 9脫離在下降途中，以刀刃體1 〇 a切 斷紗Y時，因紗尾切斷構件8自管紗〗9脫離後，瞬時落下 至與錠子基部5 b頂接的位置，就把持紗γ於紗尾切斷構件 -14- 1242059 8與錠子基部5 b之間。 第3圖表示紗Y把持於紗尾切斷構件8及錠子基部5 b 之嵌合狀態部分模式展開圖。紗Y係設在紗尾切斷構件8 及錠子基部5 b的複數凸部1 3 a、1 3 b及凹部1 4 a、1 4 b之間 ，用配置爲鋸齒狀狀態所把持。因凸部1 3 a、1 3 b之高度及 凹部1 4 a、1 4 b之深度爲2 m m程度，所以亦可不致於切斷 細支紗來把持。尙第3圖爲了容易明瞭紗Y與凸部1 3 a、 13b及凹部14a、14b之關係，用紗Y與凸部13a、13b及 凹部1 4a、1 4b之間有間隙狀態描繪，但實際上紗γ係凸部 13a、13b及凹部14a、14b所夾持。 予以落紗管紗1 9成爲第4圖（d)狀態後，插空筒管B入 錠子1，導鈎板2 1向卷取位置轉動配置後，再起動機台。 連在鋼絲圈2 0的紗γ端部至下一個落紗，把持在紗尾切斷 構件8與錠子基部5 b之間。然後，把持在紗尾切斷構件8 與錠子基部5 b之間的紗尾，於下一次落紗之際連接於管紗 1 9自錠子1脫離。 此實施形態具有以下之效果。 (1 )具備刀具部1 0的紗尾切斷構件8，於落紗時與管紗 1 9 一起上升後，由於作下降將自管紗1 9連在鋼絲圈的紗γ 把持於紗尾切斷構件8與錠子基部5 b之間，同時由刀具部 1 0切斷。因而，與卷繞紗尾在錠子1把持的先前裝置不同 ，不必要卷繞紗尾數次，可減少殘留在錠子基部5 b的紗 (紗尾）。又把持在紗尾切斷構件8與錠子基部5 b之間的紗 尾，因於下一次落紗之際從連在管紗1 9的錠子]脫離，所 -15- 1242059 以不必要實行紗尾去除作業 (2)紗Y ’於相對紗尾切斷構件8下端部及該下端部的 銳子基部5 b之上端部，由如延伸徑方向所設複數凸部〗3 a 、1 3b及凹部14a、14b所彎曲的狀態把持。因而，推壓紗 尾切斷構件8於錠子基部5 b側之力對落紗裝置2 2之動作 不fe與障礙程度的小時，亦確實地實行把持紗γ。其結果， 於洛紗停止時就不要環軌1 8複雜的動作，不招致落紗裝置 2 2動作的p早版’可_短殘留在錠子基部$ ^的紗（紗尾）。 (3 )成爲紗尾切斷構件8下端部的凸部1 3 a下面及凹部 1 4 a底面，分別以錠子1爲旋轉中心，形成爲頂點含該下 端邰外周構成位於與錠子1正交的面較上方的假想圓錐斜 面之一部分。於錠子用卷繞1圈以內狀態之紗γ，從把持 部作用了抽出紗方向的力時，作用半徑方向且向外側的力 於紗Y。其時成爲把持面的凸部1 3 a下面或凹部1 4 a底面 向下方傾斜時，與在水平面實行把持紗γ時比較，於凸部 1 3 a及凹部14 a之邊緣加以紗Y的阻力變大，變爲不易抽 出紗。其結果，與把持面爲水平時比較，可以使把持紗 γ 需要的紗尾切斷構件8推壓力小。 (4)具備有對紗尾切斷構件8之錠子基部5b確保同心的 調心手段。因而由於作用調心手段，因紗尾切斷構件8與 錠子1用同心狀旋轉，所以旋轉中不易產生振動，高速旋 轉時亦可以穩定的旋轉。 (5 )調心手段，設在紗尾切斷構件8及錠子基部5 b互相 相對的位置，具備有以錠子]爲旋轉中心構成假想圓錐斜 -16- 1242059 面的端面1 5及曲面1 6 a。因而，落紗時從錠子基部5 b脫 離移動於較錠子基部5 b上方的紗尾切斷構件8，下降而再 與錠子基部5 b繫合之際，由於繫合端面丨5及曲面1 6 a， 予以調心紗尾切斷構件8與錠子1成爲同軸。又設置調心 手段不必要確保特別的空間 (6) 錠子基部5b用樹脂製、與紗尾切斷構件8之銳子基 部5 b繫合的部分爲金屬製。以錠子基部5 b及紗尾切斷構 件8兩者爲金屬製時，紗尾切斷構件8就自管紗1 9脫離下 降（落下），與錠子基部5 b之間把持紗Y之際，於細支紗時 由把持部夾住的衝擊，在把持部之端部有切斷紗Y之慮。 可是因錠子基部5 b爲樹脂製，所以在細支紗時亦可以防止 由把持之衝擊在把持部之端部切斷紗Y。 (7) 因由螺旋彈簧1 1經常將紗尾切斷構件8賦予能於錠 子基部5 b側，所以爲輕的紗尾切斷構件8時亦能確實地把 持連在鋼絲圈2 0的紗Y °又筒管嵌插部9自筒管B脫離之 際，由螺旋彈簧1 1將紗尾切斷構件8向下方賦予能’所以 在紗尾切斷構件8之落下途中切斷紗Y時’紗尾切斷構件 8可迅速達到與锭子基部5 b頂接位置把持紗γ。 (8) 於筒管嵌插部9爲了提高與筒管B的嵌合力設置有 嵌合力增強手段（橡膠環1 7 )。因而紗尾切斷構件抗拒螺旋 彈簧1 1之賦予能力’確實地與管紗1 9 一起可上升至規定 之筒度。 實施形態並不限定於上述者’例如亦可具體化爲如次。 ◦調心手段係設於紗尾切斷構件8側’不限定在以鏡子 >17- 1242059 爲旋轉中心構成假想圓錐斜面具有曲面1 6 a的壁l 6，及與 錠子基部5 b側之凸部1 3 b端面1 5的組合。例如第5圖所 示，於形成在錠子基部5 b凹部1 4b之外周側，形成以錠子 1作旋轉中心構成向下假想圓錐之斜面具有曲面2 3 a的壁2 3 。然後形成爲將紗尾切斷構件8凸部1 3 a之外周側端部， 用可與曲面2 3 a頂接，以錠子1爲旋轉中心構成假想圓錐 斜面的形狀。 〇調心手段，係紗尾切斷構件8從錠子基部5 b上升至脫 離的位置後，下降移動於與錠子基部5 b繫合位置之際，有 配置紗尾切斷構件8與錠子基部5 b爲同心狀之功能即可， 未具備有以錠子1作旋轉中心構成假想圓錐斜面的部分也 可以。例如’亦可將推拔狀之斜面各設置複數於紗尾切斷構 件8及錠子基部5 b相對的位置。又於凹部1 4 a、1 4 b底面之 一部分形成凸部或凹部，在凸部1 3 a、1 3 b形成嵌合於其凸 部或凹部的凹部或凸部也可以。 ◦凸部13a、13b及凹部14a、14b，與徑方向正交截斷面 的剖面形狀不限於四角形狀，亦可爲三角形狀或其他之形 狀。 〇凸部1 3 a、1 3 b及凹部1 4 a、1 4 b，不限制於延伸徑方向 (放射狀）的構成，例如，亦可爲形成互相延伸於平行。 〇亦可將凸部1 3 a、1 3 b及凹部1 4 a、1 4 b作成以錠子1 爲中心的環狀。在此狀況，形成凸部1 3 a、1 3 b前端側爲前 面細的推拔狀，或由於形成凹部1 4 a、1 4 b之開口端爲擴大 端部側之寬推拔狀，可兼作調心手段。 1242059 〇作錠子基部5 b爲金屬製，將紗尾切斷構件8除刀刀體 1 〇 a外作爲樹脂製也可以。在此狀況，紗γ爲細支時亦可 以防止把持之際切斷紗Y。又亦可作錠子基部5 b及紗尾切 斷構件8兩者爲金屬製。 〇於紗尾切斷構件8頂接銳子基部5 b的狀態，代替纟單警 亦可以利用磁鐵（m a g n e t )，作爲將紗尾切斷構件8賦予& 」冃匕 於錠子基部5 b側的賦予能手段。例如埋設磁鐵在錠子基部 5b上面，固定磁性材料（例如鐵）於紗尾切斷構件8底部下 面。亦可以設磁鐵在錠子基部5 b及紗尾切斷構件8之兩側 ’或紗尾切斷構件8側設磁鐵、錠子基部5 b側設磁性材料 。在此狀況，作爲限制紗尾切斷構件8上升的限制手段， 將作停止器之止環或銷固定於錠材之規定位置即可。紗尾 切斷構件8係與管紗1 9 一起上升中由於與止環或銷頂接， 而從紡紗機之紗尾切斷裝置1 9脫離。 〇於不設置螺旋彈簧1 1構成，代替在筒管嵌插部9形成 凹部9 a於內周面形成延伸軸方向的導槽，或形成延伸軸方 向的開縫。另一方面，設與該導槽或開縫繫合的繫合凸部 (例如銷）於錠桿5 a。在此狀況，紗尾切斷構件8從管紗1 9 脫離後，確實地筆直下降。 〇凸部1 3 a、1 3 b前端面及凹部1 4 a、1 4 b底面並不限定 於外側下降傾斜形狀，亦可爲水平。可是所把持的紗Y作 用了抽起力時，其下降傾斜形狀方面對抽起紗的阻力變大 ，成爲不易抽出紗者。 ◦嵌合力增強手段不限定於橡膠環1 7，使用板狀或線狀 -19- 1242059 彈二材料也可以。彈簧材料並不限定於完全的環狀，作成 一部分有缺口的環狀也可以。又在筒管嵌插部9外面形成 的凹部內’收容彈簧材料爲如突出圓弧部也可以。又亦可 以設置用彈簧賦予能的鈕。 〇刀具部1 0係不限定於將另外的刀刃體1 0a用繫止凸部 1 〇b固定的構成’一體形成刀刃部於紗尾切斷構件8也可 以。刀刃部之形狀不限定於外形爲圓形，例如亦可爲鋸齒 狀。 〇亦可作刀具部1 〇之外徑爲小於筒管]B之底部外徑。在 此狀況，落紗時從管紗1 9連在鋼絲圈2 0的紗Y，把持於 紗尾切斷構件8與錠子基部5b之間前無切斷之慮。 〇錠1之驅動方式不限定於皮帶驅動，亦可爲設馬達於 各每一錠的所謂單錠驅動方式。 從上述實施形態能把握的發明（技術的思想），記載於以 下。 (1)於申請專利範圍第1項之發明，該限制手段於該紗 尾切斷構件頂接在該錠子基部側狀態，將紗尾切斷構件兼 作賦予能於錠子基部側的賦予能手段。 (發明之效果） 如以上詳細所述，依申請專利範圍第1〜6項之發明，於 落紗停止時不要環軌複雜的動作，不致於對落紗裝置之動 作帶來障礙，可以縮短殘留在錠子基部的紗（紗尾）。 (五）圖式簡單說明 第1(a)、（b)圖，（a)係一實施形態之錠子一部分截切模式側視圖 -20 - 1242059 、（b )係表示紗尾切斷構件之安裝狀態剖面圖 第2圖爲紗尾切斷構件與錠子基部之槪略斜視圖 第3圖爲表示紗把持狀態的部分模式展開圖。 第4圖（a)〜（d )用來說明落紗時之作用側視圖。 第5圖爲別的實施形態之錠子基部槪略斜視圖 第6圖爲表不先前技術剖面圖。 第7圖爲同上部分剖面圖。 第8圖爲表示別的先前技術剖面圖。 主要部分之代表符號說明 1 鍵子 5a 銳桿 5b 錠子基部 8 紗尾切斷構件 9 筒管嵌插部 10 刀具部 11 構成限制手段的螺旋彈簧 13a、 13b 凸部 14a、 14b 凹部 16a、 23a 曲面 19 管紗 22 落紗裝置 B 筒管 Y 紗1242059 (1) Description of the invention: (1) The technical field to which the invention belongs The present invention relates to a yarn tail cutting device in a spinning machine '§ Yang Gu's system relates to the insertion of a bobbin from a doffing device into an empty bobbin When the machine is restarted later, the yarn tail cutting device in the spinning machine which automatically performs the winding operation is executed. (2) In the prior art, ring spinning machines such as ring spinning machines and ring twisting machines that take up yarns with travellers are used to automatically perform tube changing operations when the tube is full. When starting, the yarn can be automatically taken up in the empty bobbin. It is required that the yarn connected to the roller part is still connected to the spindle through the traveller. In order to meet this requirement, the yarn tail cutting part was previously set at the base of the spindle, and the yarn tail winding part was set below it. After the tube was full, the ring plate was quickly lowered to perform the inclined winding (roll waist), and then the yarn tail winding part was wound. When the full bobbin yarn is pulled up, the yarn tail cut portion is used to cut the yarn connected to the full bobbin (yarn tail). However, in this cutting method, the yarn tail wound around the yarn end winding portion remains after the doffing at the yarn end winding 邰, and the amount of the residual yarn is increased every time the doffing is repeated, and the residual yarn treatment must be frequently performed. In addition, since the length of the winding yarn tail is long, it is difficult to remove the residual yarn. In order to solve the above-mentioned problem, it is proposed that the yarn connected from the traveler to the bobbin is held by an openable and closable holding portion, and the doffing device is pulled up by the bobbin, and the knife is cut from the holding portion to the bobbin with a cutter. (See, for example, Patent Document 1 and Patent Document 2). Patent Document 1 'Yang does not have a device which fixes the yarn tail to the spinner's foot wrap ring, and inserts a fixed spindle into the spindle, and slides the 1242059 moving sleeve to hold the device. As shown in Figures 6 and 7 of this specification, the fixed yarn loop 5 2 is provided with a plurality of protrusions 5 3 in the axial direction of the bobbin fitting portion 51 of the spindle 50. Below the foot loops 5 2. A 50 ° spindle (wh 〇r 1) 5 4 can be provided with a sliding sleeve 5 5 guided by the protrusion 5 3 in the upper and lower directions, and the upper end of the sleeve 5 5 can be topped with a foot covering yarn: the lower portion is compressed by The spring 5 6 is energized. The underfoot yarn loop 5 2 is disposed below the sleeve 5 5. In this setting, the ring rail 5 8 is lowered to the yarn end winding position during the doffing process. The rail 5 8 is a stopper 5 8 a and the stop ring 5 5 a of the sleeve 5 5 is connected with the lowering ring rail 5 8 sets. The barrel 5 5 resists the energization of the compression spring 5 6 and can move up and down the ring rail 5 8. As shown in Fig. 6, 'the ring rail 5 8 is arranged at the yarn position, and the yarn Y connected to the bobbin 60 0 via the traveler 5 9 becomes the lower end of the oversized yarn loop 5 2 and the upper end of the sleeve 5 5. Interstate. From this state, the ring rail 58 is again stopped at the doffing position, so it is in a state of being wound with the spindle 50 below one turn, and held by the bottom of the foot loop 5 2 and the upper end of 5 5. From this state, the bobbin 60 is doffed, and the cutter Y 7 cuts the yarn Y connected to the bobbin 60 during the doffing process. It is also revealed that the purpose of pulling yarn Y is not to set yarn 7 to crimp the yarn Y which is connected to the bobbin 60 0 in the course of doffing. It is also disclosed that there are marks on the underside of the foot covering loop 5 2, and a notch which is coupled with the notch is provided on the upper end of the sleeve 5 5. On the other hand, the method described in Patent Document 2 is provided with a bobbin inserting section 6a and a cutter end cutting member 61, which can be raised and lowered, as shown in the first paragraph of this specification. The upper part of the base 5 0 a is covered with the ingot spindle slide ring 52 knife 57. After the ring, the force and the tail roll are used to be used from the yarn tail sleeve, and the edge can be engraved 8 Figure 6 1 b Spindle -6 -1242059 5 0 b. The yarn tail cutting member 61 is always provided by the coil spring 62 on the spindle base 50a side. When the doffing is stopped, the ring rail stops near the top end of the yarn tail cutting member 6 1 and the spindle base 50 a. Then, the spindle 50 is stopped in a state where the winding is called a lower position by about 1 turn. Next, the bobbin is taken up by the doffing device, and the yarn end cutting member 61 is raised together with the bobbin. During the drawing, the yarn connected to the traveler from the bobbin is passed to the yarn end cutting member 61 and the base 5 of the spindle. Between 0 a. Thereafter, the yarn is held between the yarn tail cutting member 6 1 detached from the bobbin and the spindle base portion 50 a, and the yarn is cut at the cutter portion 6 1 b at the same time. (Patent Document 1) Japanese Patent Publication No. 1 0- 3 1 72 3 3 (description paragraph) (Patent Literature 2) Japanese Patent Publication No. 2 0 0 2-1 7 3 8 3 7 (description paragraph) ( 3) Summary of the Invention (Problems to be Solved by the Invention) The yarn tail cutting method described in Patent Literature 1 and Patent Literature 2 can hold the yarn tail by a winding amount of 1 turn or less. However, the device disclosed in Patent Document 1 requires a compression spring 5 6 to hold the sleeve 5 5 of the yarn in cooperation with the underfoot yarn loop 5 2 so that the upper end thereof is pressed against the underside of the underfoot yarn loop 5 2. . Compression spring 5 6 series resistive sleeve 5 5 and stopper ring 5 5 a Push the sleeve 5 5 upwards at the same time. At the same time, the sleeve 5 5 is pressed against the underfoot yarn loop 5 2 with the force required for holding. necessary. Therefore, the compression spring 56 needs to have a larger spring force than the holding force. In a ring spinning machine, there are generally around 2000 spindles on one side, and in the case of a long machine, there are more than 400 rotations on one side. Therefore, it is necessary to make the ring rail 5 8 resistant to 1242059 against the majority of the compression springs 56 and to lower it. Therefore, a large power is required to become a ring rail. In addition, the weight of the ring rail is passively implemented by the lowering of the ring rail, and it becomes difficult to lower the loop end to a predetermined position. It also wants to complicate the control of the ring rail 5 8 from the doffing stop position to the stop. On the other hand, according to the method described in Patent Document 2, the yarn tail cutting member 6 1 moves with the doffing device from the holding position to the open position along with the doffing operation of the doffing device, and the ring rail only moves down to the doffing stop position. However, compared with the patent document 1, it is easy to control the fall of the ring rail. Yarn tail cutting member 6 丨 In order to hold the yarn between the lower surface of the yarn tail and the upper surface of the spindle base 50a, when the pushing force of the yarn tail cutting member 61 is small, the yarn is cut after the empty bobbin is inserted. At the start of winding, sometimes the yarn cannot be taken up from the grip. In order to increase the holding force of the yarn tail cutting member 61, to increase the weight of the yarn tail cutting member 61, or to increase the ability of the coil spring 62, there may be obstacles to the operation of the doffing device. The present invention has been made in view of the above-mentioned previous problems, and its purpose is to provide an operation obstacle that does not prevent the moon from falling when the doffing is stopped, and can shorten the yarn tail cutting of the spinning machine at the residual yarn (yarn tail) at the base of the spindle. Device. (Means to solve the problem) In order to achieve the above-mentioned object, for example, the invention of claim 1 of the scope of patent application, when the spindle of the bobbin drawn by the doffing device is inserted into the empty bobbin and restarted, the roll is automatically executed. The yarn tail cutting device of the take-up spinning machine includes a spindle bar extending upward from the spindle base. It also has a bobbin inserting part which is provided on the sharp rod so as to be able to be raised and lowered, and is also used for inserting a bobbin; and a cutter part provided below the insert part of the bobbin insert-8-1242059, and has a lower end portion A yarn tail cutting member which is abutted on the spindle base and can hold the yarn tail between the spindle base and the spindle base. There are a plurality of convex portions and concave portions provided at the lower end portion of the yarn tail cutting member and the upper end portion of the spindle base portion of the lower end portion, which are engageable with each other. Furthermore, there is provided a restriction means provided between the yarn tail cutting member and the spindle rod, and a restriction means for restricting the yarn tail cutting member from rising to a predetermined height or higher than the position abutting on the spindle base during doffing. The bobbin of the present invention is mounted on the spindle in a state where the lower part of the bobbin is fitted into the bobbin insertion portion of the yarn tail cutting member. When the doffing stops, the ring rail is lowered, and the yarn connected to the bobbin via the traveler passes the yarn tail cutting member and the position below the top contact portion of the spindle base to stop the ring rail. Then, the yarn is wound at a position where the yarn tail cutting member and the top contact portion of the spindle base stop the spindle. Secondly, the bobbin is drawn by the doffing device, and the yarn connected to the traveler from the bobbin is guided between the yarn tail cutting member and the base of the spindle during the drawing. After that, the raising of the yarn tail cutting member is restricted by the restriction means, and the yarn tail cutting member is separated from the bobbin and lowered. Then, the yarn is held between the yarn tail cutting member detached from the bobbin and the base of the spindle, and the yarn is cut by the cutter portion. It is connected between the end of the traveler yarn and the next doffing, and is held between the yarn tail cutting member and the base of the spindle. The yarn held between the yarn tail cutting member and the base of the spindle is detached from the spindle together with the bobbin at the next doffing. Since the yarn is held in a bent state by a plurality of convex portions and concave portions provided on the lower end portion of the yarn tail cutting member and the upper end portion of the spindle base, the force pushing the yarn tail cutting member on the side of the base end of the spindle , Do not give a small degree of obstacle to the operation of the doffing device, also reliably implement yarn holding. Therefore, do not perform complicated movements of the ring track when the doffing is stopped, and do not cause obstacles to the operation of the doffing device, and shorten the yarn (yarn tail) remaining on the base of the spindle -9-1242059. For the invention in the second scope of the patent application, the invention in the first scope of the patent application 'is set such that the plurality of convex portions and concave portions extend in the radial direction. In the present invention, the yarn is held in a zigzag shape in a state of a plurality of convex portions and concave portions, so that the yarn tail cutting member has a small pressing force, and the yarn can be held in a grasped state. For example, if the invention in item 3 of the patent application scope is in the invention in item 1 or 2 of the patent application scope, the lower end of the yarn tail cutting member has a spindle as the center of rotation, and is formed such that the outer periphery of the lower end portion is located at Above the sub-orthogonal surface, it constitutes a part of the hypothetical conical bevel. When a yarn wound in a spindle state with one roll or less is applied, a force acting in the direction of pulling the yarn from the gripping portion is applied to the yarn in a radial direction and outside. On the other hand, according to the present invention, when the gripping surface is inclined downward, the resistance of the yarn is increased compared with the state in which the gripping yarn is performed on a horizontal plane, and it becomes difficult to pull up the yarn. As a result, the pushing force of the yarn tail cutting member required to hold the yarn can be made smaller compared to a case where the holding surface is horizontal. If the invention in the fourth scope of the patent application is the invention in the first to the third scope of the patent application, it is provided with a centering means for ensuring the concentricity of the spindle base of the yarn tail cutting member. According to the function of the centering means of the present invention, the yarn tail cutting member and the spindle rotate concentrically, so it is not easy to generate vibration during rotation, and it can also rotate stably during high-speed rotation. If the invention in the scope of patent application No. 5 is the invention in the scope of patent application No. 4, the self-aligning means is provided at a position where the yarn tail cutting member and the base of the spindle are opposed to each other, and has a structure that makes The surface of the imaginary conical bevel of the center of rotation. In the present invention, at the time of doffing, the yarn tail cutting member moving away from the base of the spindle from the base of the spindle -10- 1242059 is moved upward and descends to re-engage with the base of the spindle. The centering yarn tail cutting member is coaxial with the spindle. If the invention in the scope of patent application No. 6 is an invention in any of the scope of patent applications No. 1 to 5, one side of the joint portion with the base of the spindle and the base of the spindle of the yarn tail cutting member is Metal, resin on the other side. When both are made of metal, the yarn tail cutting member is detached from the bobbin and lowered (dropped), and when the yarn is held between the base of the spindle and the fine yarn, the impact of the yarn held by the holding portion is Concerns about the cutting part at the end of the holding part. In this case, the yarn from the base of the spindle to the traveler is cut, and the yarn cannot be automatically wound when restarted. However, when one side is made of resin and the yarn is finely counted, it is possible to prevent the yarn from being cut at the end of the holding portion by the impact of the holding. (4) Embodiment (Embodiment of the invention) An embodiment of the present invention will be described below with reference to Figs. 1 (a) and (b) to 4 (a) to (d). As shown in FIG. 1 (a), the spindle 1 is rotatably supported by a bearing 4 on a spindle 3 (bolster) fixed to the spindle rail 2. The spindle 1 includes a spindle shaft portion 5 and a spindle shaft 6 fixed to the lower center portion of the spindle shaft section 5. The spindle shaft 6 is inserted into the spindle foot 3 to be rotatably supported on the spindle foot 3. The spindle portion 5 includes: a spindle rod 5 a on which the bobbin B is mounted; a spindle base portion 5 b formed on the lower side of the spindle rod 5 a than the spindle rod 5 a; and a spindle base portion 5 b formed on the lower side of the spindle base 5 b. Hang the belt part 5 c. The part of the shaft part 5 other than the watch base part 5b is an ingot or an alloy made of an ingot base 5b, which is fitted and fixed to the lower part of the ingot shaft 5a. The spindle shaft 6 1242059 is embedded in the spindle portion 5. An upper portion of the spindle rod 5a is provided with a stopper member (for example, a button piece) 7 that stops the bobbin b from being rotatable integrally. The spindle shaft 5a extends from the spindle base b5b, and the yarn tail cutting member 8 is set to be liftable. As shown in FIG. 1 (b), the yarn tail cutting member 8 includes: a bobbin inserting portion 9 for inserting the bobbin B; and a cutter 邰 1 0 provided on the lower side of the bobbin inserting portion 8. The cutter part 10 has a ring-shaped cutting edge body 〇0 a as a different body, and has a plurality of system-stop protrusions 〇b for fixing the cutting edge body 10a. In this embodiment, the diameter of the front end of the blade body 10 a is larger than the outer diameter of the lower end of the bobbin b. The bobbin insertion portion 9 is formed in a circular shape, and a concave portion 9a for receiving the coil spring 11 is formed on the inside. The yarn tail cutting member 8 is configured to abut the lower end 锭 of the spindle base 5b, and can hold the yarn tail between the spindle base 5b and the spindle base 5b. The spindle rod 5a is in a state where the yarn tail cutting member 8 abuts on the spindle base portion 5b, and a collar 12 serving as a stopper is fixed at a lower portion of the spindle rod 5a relative to the upper end of the bobbin insertion portion 9. The outer diameter of the collar 12 is formed to be smaller than the inner diameter of the recessed portion 9a, and the yarn tail cutting member 8 slides along the collar 12. The bobbin insertion portion 9 is formed so that the outer diameter becomes smaller on the upper side. The lower end of the coil spring 11 is abutted on the lower end of the concave portion 9a, and the upper end of the coil spring 11 is abutted on the lower end of the collar 12 and accommodated in the concave portion 9a. The coil spring 11 is configured as a spring capable of constantly providing the yarn tail cutting member 8 to the spindle base 5b side. The coil spring 11 is provided before the yarn end cutting member 8 and the spindle 5a, and is configured to restrict the yarn end cutting member 8 when the doffing is performed. Restriction means for raising above the prescribed height from the abutment position with the base 5b of the spindle. As shown in Fig. 1 (b) and Fig. 2, the lower end portion of the yarn tail cutting member 8 and the upper end portion of the lower end portion 5b are provided with a 12-125959 coupling with each other if extending in the radial direction. Of convex parts 1 3 a,] 3 b and concave parts 1 4 a, 1 4 b. Therefore, the lower end portion of the yarn tail cutting member 8 and the upper end portion of the spindle base portion 5b are provided with a plurality of teeth that mesh with each other. The cross-sectional shapes of the convex portions 1 3 a and 1 3 b and the concave portions 1 4 a and 1 4 b orthogonal to the radial direction are formed in a quadrangular shape. The heights of the convex portions 1 3 a and 1 3 b and the depths of the concave portions 1 4 a and 1 4 b are preferably about 2 mm. The lower end portion of the yarn tail cutting member 8 is formed as a part of an imaginary conical inclined surface located above the orthogonal surface of the spindle 1 including the outer periphery of the lower end if the apex of the rotation center of the spindle 1 is formed. The upper end of the spindle base 5b is also formed as a part of an imaginary conical inclined surface located above the orthogonal plane of the spindle 1 including the periphery of the lower end with the spindle 1 as the center of rotation. The spindle end 5 b of each of the convex portions 1 3 b of the spindle base 5 b is formed with a curved surface formed by the inclined surface of the downward imaginary cone with the spindle 1 as the center of rotation. A wall 16 is formed on the side of the spindle 5 a of each of the recesses 14 a of the yarn tail cutting member 8 so as to be in abutment with the end surface 15 and using the spindle as the center of rotation to form an imaginary conical oblique mask curved surface 16 a. The end face 15 and the wall 16 constitute a centering means for ensuring concentricity with the spindle base 5 b of the yarn tail cutting member 8. A ring-shaped groove 9 6 is formed on the outer peripheral surface of the lower part of the bobbin inserting portion 9, and a rubber ring 17 is housed in the groove 9 6 with a part protruding from the groove 9 6. The rubber ring 17 is configured as a fitting force enhancing means for increasing the fitting force between the bobbin insertion portion 9 and the bobbin 8. The operation of the device constructed as described above will be described next. The bobbin B is fitted into the bobbin inserting portion 9 of the lower end of the yarn tail cutting member 8, and the upper portion is attached to the spindle 1 in a state of being tied to the stopper member 7 so as to be integrally rotatable. Then, the spindle 1242059 1 ′ and the spindle 1 are rotated integrally with the spindle 1 by a belt rotation 1242059 1 ′ which is crimped to the belt-hanging portion 5 c by a not shown. When the spinning is continued to full pipe, the prescribed stop action is performed. The ring rail 18 is rapidly lowered with the same action as before, and the tilting roll (waist roll) 19 a of the spindle 1 is performed. Thereafter, the ring rail 18 stops the yarn Y connected to the bobbin 19 via the traveler 20 at a position below the top contact portion of the yarn end cutting member 8 and the spindle base 5b. Then, at a position below the top contact portion of the yarn tail cutting member 8 and the spindle base 5 b, if the yarn is wound for about one turn, the brake is stopped to stop the spindle 1. Next, the hook guide plate is arranged at a dodging position which does not hinder doffing, and becomes a state shown in Fig. 4 (a). Next, as shown in FIG. 4 (b), the bobbin (full bobbin) is taken up by the doffing device 22. The yarn tail cutting member 8 rises together with the bobbin yarn 19 until it is pulled up, and the yarn Y connected to the traveler 20 is introduced from the bobbin 19 between the yarn tail cutting member 8 and the spindle base 5b. The yarn γ wound in the state of the fine base 5 b is moved along the outer surface of the spindle 5 a when the yarn end cutting member 8 rises together with the tube yarn 19 from the state shown in Fig. 4 (a). When the yarn tail cutting member 8 that has risen together with the bobbin 19 reaches a predetermined height, the yarn tail cutting member 8 is detached from the bobbin 19 by the capacity imparted by the coil spring 11. Then the yarn tail cutting member 8 is lowered to the position where it is in contact with the spinning machine 5 b. 'The yarn y attached to the bobbin 19 to the traveler 2 0 is cut at the yarn tail cutting structure. The member 8 and the spinning machine 5 b between. Since the bobbin 19 continues to rise ', the yarn γ is crimped to the blade body 10 a in a tensioned state and cut, resulting in the state shown in FIG. 4 (C). When the yarn tail cutting member 8 detached from the bobbin yarn 19 during the descent, when the yarn Y was cut by the blade body 10a, the yarn tail cutting member 8 fell off from the bobbin 9 and immediately dropped to the base of the spindle. At 5 b, the yarn γ is held between the yarn end cutting member -14-1242059 8 and the spindle base 5 b. FIG. 3 is a partially expanded view showing a state in which the yarn Y is held in the fitting state of the yarn tail cutting member 8 and the spindle base 5 b. The yarn Y is provided between the plurality of convex portions 1 3 a, 1 3 b and the concave portions 1 4 a, 1 4 b of the yarn tail cutting member 8 and the spindle base portion 5 b and is held in a zigzag state. Because the height of the convex portions 1 3 a and 1 3 b and the depth of the concave portions 1 4 a and 1 4 b are about 2 mm, it is not necessary to cut the fine yarn to hold it.尙 In Fig. 3, in order to easily understand the relationship between the yarn Y and the convex portions 13a and 13b and the concave portions 14a and 14b, there is a gap between the yarn Y and the convex portions 13a and 13b and the concave portions 14a and 14b. The upper yarn γ is sandwiched between the convex portions 13a and 13b and the concave portions 14a and 14b. After the doffing bobbin 19 is brought into the state shown in FIG. 4 (d), the empty bobbin B is inserted into the spindle 1, and the hook plate 21 is turned to the winding position, and then the machine is started. The end of the yarn γ connected to the traveler 20 to the next doffing yarn is held between the yarn tail cutting member 8 and the spindle base 5b. Then, the yarn tail held between the yarn tail cutting member 8 and the spindle base 5 b is connected to the bobbin 19 and detached from the spindle 1 at the next doffing. This embodiment has the following effects. (1) The yarn tail cutting member 8 provided with the cutter part 10 is raised with the bobbin 19 during doffing, and the yarn y connected to the traveler 19 from the bobbin γ is held by the yarn tail cut due to the lowering At the same time, the cutting member 8 and the spindle base 5 b are cut by the cutter portion 10 at the same time. Therefore, unlike the previous device in which the winding tail is held on the spindle 1, it is not necessary to wind the winding tail several times, and the yarn (yarn tail) remaining on the spindle base 5b can be reduced. The yarn tail held between the yarn tail cutting member 8 and the spindle base 5 b is detached from the spindle connected to the bobbin 19 during the next doffing, so -15-1242059 is unnecessary. Carry out the yarn tail removal operation (2) Yarn Y 'is formed on the lower end portion of the yarn tail cutting member 8 and the upper end portion of the sharp base 5 b of the yarn end by a plurality of convex portions provided in the direction of the extension diameter. 3 a, 1 3b and the recessed parts 14a and 14b are grasped in a bent state. Therefore, the action of pushing the yarn tail cutting member 8 on the side of the spindle base 5b to the doffing device 22 does not require a small amount of obstacles or obstacles, and the yarn γ is reliably carried out. As a result, the complicated movements of the ring rail 18 are not required when the yarn is stopped, and the early version of p which does not cause the doffing device 22 to operate can be short of the yarn (yarn tail) remaining at the base of the spindle. (3) The bottom surface of the convex portion 1 3 a and the bottom surface of the concave portion 1 4 a that become the lower end of the yarn tail cutting member 8 are each formed with the spindle 1 as the rotation center and formed as a vertex containing the lower end. The intersecting surface is part of the upper hypothetical conical bevel. When the yarn γ that is wound within one turn of the spindle is used, a force in the direction of extracting the yarn is applied from the gripping portion, and a force outward in the radial direction is applied to the yarn Y. At this time, when the bottom surface of the convex portion 1 3 a or the bottom portion of the concave portion 1 4 a which becomes the gripping surface is inclined downward, compared with the case where the gripping yarn γ is performed in a horizontal plane, the resistance of the yarn Y is added to the edges of the convex portion 1 3 a and the concave portion 14 a. It becomes large and becomes difficult to pull out the yarn. As a result, the pushing force of the yarn tail cutting member 8 required for holding the yarn γ can be made smaller than that when the holding surface is horizontal. (4) Equipped with a centering means for ensuring concentricity with the spindle base 5b of the yarn tail cutting member 8. Therefore, due to the self-aligning means, the yarn tail cutting member 8 and the spindle 1 rotate concentrically. Therefore, vibration is not easy to occur during rotation, and stable rotation can be performed even at high speed. (5) Self-aligning means is provided at the position where the yarn tail cutting member 8 and the spindle base 5 b are opposite to each other, and is provided with an end surface 15 and a curved surface of an imaginary conical oblique -16-1242059 surface with a spindle] as a rotation center. 1 6 a. Therefore, at the time of doffing, the yarn tail cutting member 8 moved away from the base of the spindle 5 b and moved above the base of the spindle 5 b, dropped, and then joined with the base of the spindle 5 b. On the curved surface 16 a, the centering yarn tail cutting member 8 is coaxial with the spindle 1. A centering means is not necessary to ensure a special space. (6) The base of the spindle 5b is made of resin, and the part that is joined to the sharp base 5b of the yarn tail cutting member 8 is made of metal. When both the spindle base 5 b and the yarn tail cutting member 8 are made of metal, the yarn tail cutting member 8 is separated from the bobbin 19 and lowered (dropped), and the yarn Y is held between the spindle base 5 b In the meantime, the impact of being pinched by the gripping portion during the fine yarn count may cause the yarn Y to be cut at the end portion of the gripping portion. However, since the spindle base 5b is made of resin, it is possible to prevent the yarn Y from being cut at the ends of the gripping portion by the impact of the gripping when the yarn is finely counted. (7) Since the yarn end cutting member 8 is often provided on the side of the spindle base 5 b by the coil spring 11, the yarn end cutting member 8 can surely hold the yarn connected to the traveler 20 even when it is a light yarn end cutting member 8. Y ° When the bobbin insertion portion 9 is detached from the bobbin B, the yarn tail cutting member 8 is energized downward by the coil spring 11 so that the yarn Y is cut during the fall of the yarn tail cutting member 8 'The yarn tail cutting member 8 can quickly reach the position of holding the yarn γ in contact with the spindle base 5 b. (8) A fitting force enhancing means (rubber ring 17) is provided in the bobbin insertion portion 9 to increase the fitting force with the bobbin B. Therefore, the yarn tail cutting member resists the imparting ability of the coil spring 11 and the tube yarn 19 can be reliably raised to a predetermined cylinder degree. The embodiment is not limited to the above-mentioned, for example, and may be embodied as follows. ◦The self-aligning means is provided on the 8 side of the yarn tail cutting member. 'It is not limited to the wall 16 which has a curved surface with a curved surface 1 6 a with a mirror > 17-1242059 as the center of rotation, and 5 b side with the base of the spindle. The combination of the convex portion 1 3 b and the end surface 15. For example, as shown in FIG. 5, a wall 2 3 having a curved surface 2 3 a formed on the inclined surface of the downwardly imaginary cone with the spindle 1 as the center of rotation is formed on the outer peripheral side of the concave portion 14 b of the spindle base 5 b. Then, it forms the shape of an imaginary conical bevel by forming the outer end of the convex part 1 3 a of the yarn tail cutting member 8 with the curved surface 2 3 a and abutting on the curved surface 2 3 a. 〇 Self-aligning means: After the yarn tail cutting member 8 is raised from the spindle base 5 b to the disengaged position, the yarn tail cutting member 8 and the spindle are disposed when the yarn tail cutting member 8 is lowered and moved to the engagement position with the spindle base 5 b. The sub base portion 5 b may have a concentric function, and may not have a portion that forms a hypothetical conical bevel with the spindle 1 as the center of rotation. For example, 'a plurality of push-shaped bevels may be provided at plural positions of the yarn tail cutting member 8 and the spindle base 5b. Further, a convex portion or a concave portion may be formed in a part of the bottom surface of the concave portions 1 a, 1 4 b, and a concave portion or a convex portion may be formed in the convex portions 1 a, 1 3 b and fitted to the convex portion or the concave portion. ◦The cross-sectional shape of the convex sections 13a and 13b and the concave sections 14a and 14b perpendicular to the radial direction is not limited to a rectangular shape, but may be a triangular shape or other shapes. 〇 The convex portions 1 a, 1 3 b, and the concave portions 1 a, 1 4 b are not limited to the configuration in the radial direction (radial), and may be formed to extend parallel to each other, for example. 〇 The convex portions 1 a, 1 3 b, and the concave portions 1 a, 1 4 b may be formed into a ring shape with the spindle 1 as the center. In this case, the front ends of the convex portions 1 3 a and 1 3 b are formed in a thin push-out shape at the front, or the open ends of the concave portions 1 4 a and 1 4 b are formed in a wide push-out shape at the end portions. Doubles as a means of aligning. 1242059 〇 The spindle base 5 b is made of metal, and the yarn tail cutting member 8 may be made of resin other than the blade body 10 a. In this case, the yarn Y can be prevented from being cut when the yarn γ is finely held. Alternatively, both the spindle base 5b and the yarn tail cutting member 8 may be made of metal. 〇 In the state where the yarn tail cutting member 8 is in contact with the sharp base 5 b, instead of a single policeman, a magnet may be used as a means of giving the yarn tail cutting member 8 to the base of the spindle 5 b. Empowerment means. For example, a magnet is embedded on the base of the spindle 5b, and a magnetic material (e.g., iron) is fixed below the bottom of the yarn tail cutting member 8. A magnet may be provided on both sides of the spindle base 5 b and the yarn tail cutting member 8 ′, or a magnet may be provided on the yarn tail cutting member 8 side, and a magnetic material may be provided on the spindle base 5 b side. In this case, as a restriction means for restricting the yarn tail cutting member 8 from rising, a stop ring or a pin serving as a stopper may be fixed to a predetermined position of the ingot. The yarn tail cutting member 8 is disengaged from the yarn tail cutting device 19 of the spinning machine because it is in contact with the stop ring or the pin while rising with the bobbin 19. 〇The coil spring 11 is not provided, instead of forming a recess 9a in the bobbin inserting portion 9, a guide groove in the direction of the extension axis is formed on the inner peripheral surface, or a slit in the direction of the extension axis is formed. On the other hand, an engaging protrusion (for example, a pin) engaged with the guide groove or slit is provided on the spindle 5a. In this state, after the yarn tail cutting member 8 is detached from the bobbin 19, it is lowered straight. 〇 The front end surfaces of the convex portions 1 a and 1 3 b and the bottom surfaces of the concave portions 1 a and 1 4 b are not limited to the shape of the downward sloping outside and may be horizontal. However, when the held yarn Y is subjected to a lifting force, the resistance of the lowered and inclined shape to the pulled yarn becomes larger, making it difficult to pull out the yarn. ◦The means for increasing the fitting force is not limited to the rubber ring 17, but it is also possible to use a plate-shaped or wire-shaped -19-1242059 spring two material. The spring material is not limited to a complete ring shape, and a ring shape having a part of a notch may be used. The spring material may be accommodated in the recessed portion formed outside the bobbin insertion portion 9 as a protruding arc portion. It is also possible to provide a button which is energized by a spring. 〇 The cutter portion 10 is not limited to the configuration in which the other blade body 10a is fixed by the retaining projections 10b ', and the blade portion may be integrally formed with the yarn tail cutting member 8. The shape of the blade portion is not limited to a circular shape, and may be, for example, a zigzag shape. 〇 Can also be used as the outer diameter of the tool section 10 is smaller than the outer diameter of the bottom of the bobbin] B. In this case, the yarn Y connected from the bobbin 19 to the traveler 20 at the time of doffing is held between the yarn tail cutting member 8 and the spindle base 5b without any possibility of cutting. The driving method of the ingot 1 is not limited to a belt drive, and may be a so-called single ingot driving method in which a motor is provided for each ingot. The inventions (technical ideas) that can be grasped from the above embodiments are described below. (1) The invention according to item 1 in the scope of the patent application, the limiting means is that the yarn tail cutting member is abutted on the base side of the spindle, and the yarn tail cutting member is also used to impart energy to the spindle base. means. (Effects of the Invention) As described in detail above, according to the inventions in claims 1 to 6 of the scope of patent application, when the doffing is stopped, the complicated movement of the loop track is not caused, which does not cause obstacles to the operation of the doffing device and can shorten the residual Yarn (tail) at the base of the spindle. (5) A brief description of the drawings. Figures 1 (a) and (b), (a) is a side view of a part of the spindle cutting mode of an embodiment -20-1242059, (b) shows the yarn tail cutting member Sectional view of the installation state. FIG. 2 is a schematic perspective view of the yarn tail cutting member and the base of the spindle. FIG. 3 is a partial pattern development view showing the yarn holding state. Figures 4 (a) to (d) are side views for explaining the action during doffing. Fig. 5 is a schematic oblique view of the base of the spindle in another embodiment. Fig. 6 is a cross-sectional view showing the prior art. Fig. 7 is a sectional view of the same part. Fig. 8 is a sectional view showing another prior art. Description of main symbols: 1 key 5a sharp rod 5b spindle base 8 yarn tail cutting member 9 bobbin inserting part 10 cutter part 11 coil springs 13a and 13b constituting restriction means convex parts 14a and 14b concave parts 16a and 23a Curved surface 19 bobbin 22 doffing device B bobbin Y yarn